Apparatus and method for making curled yarn



March 8, W1949. E, GREENWOOD 2,463,689

APPARATUS AND METHODl FOR MAKING CURLED YARN Filed Deo. 28, 1946 2 Sheets-Sheet 1 l oo t 'tu ,N m m x Y, "SI Il: m ),4 l ff m w l Q5 *t o O O Wees/210000Z,

' uvzaeys E. GREENWOOD APPARATUS AND METHOD FOR MAKING CURLED'YARN Filed Dec. 28, 194e March s, 1949.

2 lSheets-Sheet 2 Pianeta M. s, 194s APPARATUS AND METHOD FOR MAKING CURLED YARN Edgar Greenwood, Lowell, Mass.. assignor to Massachusetts Mohair Plush Company, Lowell, Mall., a corporation of Massachusetts Application December 28, 1946, Serial No. 718,984

This invention relates to the making of curled yarn such as is used in weaving certain types of fabric which include in their structure a yarn having a permanent curl or wavy effect.

One known method used for producing curled yarn is to wind or wrap the yarn to be curled about a core strand thereby to produce a composite strand composed oi the core strand and the winding thereabout. and then to steam or otherwise treat the composite strand to set the curl in the yarn which is wound about the core strand, after which the yarn is unwound from 12 Claims. Cl. 57-3) the core and may be rewound on a suitable yarn carrier for use in the weaving operation. The treatment to which the composite strand is subjected is such that when the yarn is thus unwound from the core strand. it will have the desired permanent curl or wavy effect.

The means heretofore employed for winding the yarn to be curled about the core strand is so constructed that there are definite limits to the length of the yarn that can be so wound at any one operation. In large textile mills there is often a demand forr curled yarn ends several thousand yards in length, but to fill such an order, it has heretofore been necessary to curl the yarn in relatively short lengths because of the limitations imposed by the mechanism heretofore used in wrapping the yarn to be curled about the core strand. i

One oi the objects oi my invention is to provide l an apparatus` for use in making curled yarn by which a greatly increased length of yarn to be curled can be wound about the core strand at a single operation, thus making it possible to produce unbroken, continuous lengths of curled yarn several times as long as could be made by means of the mechanism heretofore used.

A further object of the invention is to provide an apparatus for use in making curled yarn which produces a composite strand of such a character that after it has' been treated to set the curl in the individual yarn ends comprising the plural ply strand, the core strand can be readily removed from the composite strand without unwinding the plural ply stranci'therefrom,l thereby leaving the plural ply strand in a tightly coiled condition, said plural ply strand being of such a character that a pulling force applied thereto inthe direction of its length will stretch said strand into one in which the individual curled yarn ends lie parallel to each other and in a non-twisted relation so that'said individual curled yarn ends areready for immediately being wound on individual bobbins or other yarn carriers.

A further object oi the invention is to provide an improved method of making a composite strand of the above type.`

In the drawings wherein I have illustrated va selected embodiment of my invention:

Fig. 1 is a plan view oi a device embodying my invention for producing the composite strand above'reierred to.

Fig. 2 is a side view of Fig. l.

Fig. 3 is a longitudinal sectional view on-substantially the line 3-3, Fig, 1.

Fig. 4 is an enlarged sectional view of the core strand carrier.

Fig. 5 is a section on the line 5-5, Fig. 3.

Fig. 6 is an enlarged view illustrating the character oi the composite strand produced by the apparatus shown, and also illustrating the manner in which the individual curled yarn end s may be withdrawn directly from said strand after the core strand has been removed.

Fig. 7 is a fragmentary view showing a different embodiment of the invention.

Fig. 8 is a view illustrating one way in which the core strand can be removed from the composite strand.

Referring first to Fig. 6 which shows the product produced by the machine, i indicates the core strand, and 2 -indicates the plural ply strand of yarn to be curled which is wound or wrapped tightly about the core strand to produce the composite strand 35.

The apparatus herein disclosed comprises a source of supply for the core strand i from which it is delivered, a stationary source of supply for the yarn to .be curled, feeding means to feed the core strand forward, and means acting on the portion oi the yarn to be curled between its stationary source and the feeding means to carry said yarn bodily around the core strand supply thereby wrapping'the yarn to be'curled about thecore strand as it is delivered from said supply..

Where the yarn to be curled and wrapped around the core stand is in the form of a plural ply strand in which the yarn ends lie parallel but with a nontwisted relation, the operation of carrying such plural ply strand around the source of supply for the core strand is so carried out that the threads in the plural ply strand will remain in their non-twisted relation as they are wound about the core strand, and after the composite strand has been treated to set the curl in the yarn ends of the plural ply strand, and the core strand has been removed, the coilediplur'al ply strand canbe converted into a strand composed of parallel curled yarn-ends having a nonrelation by simply applying to said coiled plural; ply strand a pulling force in the direction of its ength. f

The core strand I is herein shown as being supplied from a bobbin 3 which is mounted on a rotary bobbin carrier 4, the latterl having a bearing portion I which is mounted ior rotation in a suitable bearing 8 that is carried by a base or supporting member 1. The bobbin carrier 4 is provided with a. suitable tension device 8 through which the core strand passes as it leaves the bobbin or spool 3 thereby to produce in the core strand a desirable tension. From the tension device il the core strand i extendsthrough a guide e with whichthe carrier t is provided and thence through an axial passage lil with which said carrier is also provided. 'I'he bobbin carrier t is also provided with a conical projecting nose portion il at the delivery end of the passage it. The bearing portion E of the carrier il is made with a central axial passage i2 through which the composite strand is delivered.

The source oi' supply for the yarn to be curled is shown as in the form of a creel I3 carrying a plurality of sls it from each of which a yarn end is withdrawn. These various yarn ends are lead from the spools through a trumpet or eye it where they are condensed into a plural ply strand which the individual yarn ends lie parallel to each other butin a ncn-twisted relation. Such plural ply strand entends past the core strand supply bobbin 3 outside of the latter and through a guide opening le formed in the carrier il, said plural ply strand extending then to the nose portion il of the carrier where it is wra ped around the core strand i to produce the com osite strand 35.

For this owl-s se the bobbin carrier 4 is rotated about its unis, and during such rotation, the portion il! of the plural ply strand 2 is carried bodily around the core strand bobbin t, this operation resulting in the winding oi' the plural ply strand l2 about the core strand l as shown in Fig. d. A

For thus rotating the carrier 4. the portion il) thereof is provided with gear teeth I 9 which mesh with and are driven by a gear 2il'on a drive shaft ill that is mounted in suitable bearings 22 carried by the base or supporting frame l. lThe shaft di may he driven from any suitable source of power and is herein shown as having a driving 'pulley il@ thereon which may be connected by a driving belt with any prime mover.

Means are provided for feeding the core strand l i'orward as the plural ply strand 2 is wrapped thereabout. Such feeding means areiillustrated as feed rolls 24, 25, 2B which are journaled in a suitable support 21 carried by the base 1, said feed rolls being conveniently driven from the drive shaft 2i. For this purpose the drive shaft is shown as having a worm 28 fast thereon which meshes with and drives e. worm gear 29 mounted on a stub shaft 30 carried by the stand 21. Said scar 29 has fast therewith a gear 2l which meshes with and drives a gear 32 that is rigid withl the lower feed roll 24 and situated at one end thereof. The opposite end of said feed roll 24 has a gear meshing with an' intermediate gear Il whichl in. turn meshes withand drives a gear 34 fast on the shaft of the upper roll 26.

' n The composites'trand 35 is shown as passing under lthe lower feed roll 24 and then between f the latter and the intermediate feed roll 25 and fpartly around the latter and 'then between the feed rolls and 2B.

As stated above, plural ply strand 2 of the yarn ends to be curled about the core strand I is accomplished by carrying the portion I1 of said plural ply strand bodily around the core strand bobbin I. the plural ply strand being wrapped about the core strand as the latter leaves the tubular nose portion II, it being understood that auch bodily movement of the portion il ci the plural ply strand about the core strand bobbin 3 is accomplished bythe rotation of the bobbin carrier 4 and the fact that the plural ply strand is lead through the guide opening it of said carrier t. The carrier 4 is formed with a head portion 3@ in which the guide eye t for the core strand i is formed. The peripheral edge oi this head t8 is smooth, and in its forward travel, the plural ply strand 2 contacts with the periphery of said head as shown` in Figs. 3 and d.

Associated with the guide eye it are a pair of rollers 3l rotatably mounted in a support 6I and between which the plural ply strand 2 is lead after it leaves the guide eye i5, said rollers el serving to apply a suitable tension to the strand 2. The individual yarn ends or plies making up the plural pli! strandare substantially parallel to each other and in a non-twisted relation, and this parallel non-twisted relation of the individual yarn ends is maintained in the portion il oi.said plural ply strand while it is being rotated about the core strand supply and still exists in said strand as it is wrapped` about the core strand, and hence in each turn of the plural ply strand about the core strand the individual yarn ends have such parallel nontwisted relation. l

The core strand supply bobbin t is so mounted that its axis is out of line with the nip of the rolls 3l, theconstruction illustrated being such that the axial line. of the core strand bobbin I is below the nip or said rolls. is a result o! this odset relation between the bobbin 3 and the rolls al, the plural ply strand 2 will be subjected to an increased tension or pulling force when it is passing around the under side of the bobbin 3 as illustrated in Figs. 3 and e, and such tension I or pulling force will be relieved when the bobbin and its carrier havemade a half revolution so that the plural ply strand 2 is on the upper side of the bobbin. The plural ply strand is thus periodically subjected to an appreciable tension or pulling force, and such tension or pulling forceis released between each period, and as shownin the drawings the increased pulling force or tension-is applied during one part of each revolution of the carrier 4 and such pulling force or tensioIiris relieved during another part of each"s u ch revolution. Each time that the increased tension or pulling force is applied, the plural plyv strand will be fed forward from its source of supply, and when the pulling force or tension is relieved, as it is when the strand is passing over the top of the bobbin, said plural ply strand will be slightly slack.

During the period in which the plural ply strand is slack, the individual yarn ends of the plural ply strand where they are being delivered to the nose portion I I of the carrier, will become readjusted relative to each otherl as necessary so that the strands are delivered to the nose lII and 'wrapped thereabout in a non-twisted relation. v

While the actual wrapping or winding of the plural ply strand 2 about the core strand occurs at the end of the nose I I- where the core strand 4 the operation of winding theis delivered from said nose, yet during the operation of the apparatus andas a result'of theA offset relation between the bobbin 3 and the nip of the rolls 31, there will be one or two turns of the plural ply strand 2 about the end of the nose II as shown at 38.

The spacing of the adjacent turns of the plural ply strand 2 as it is wound about the core strand depends on the relation between the forward feeding movement of the composite strand 35 and the speed of rotation of the bobbin carrier 4. The device shown in Figs. 1 to 3 is intended to operate so as to produce a composite strand 35 in which the turns of the plural ply strand will be close together as shown at the left in Fig. 6, and said plural ply strand will be tightly wrapped about the core strand., This way of wrapping the plural ply strand about the core strand will produce individual curled yarn ends 52 having a relatively tight curl as illustrated at the right in Fig; 6.

In Fig. 'l there is shown a construction which provides for adjusting the speed of feeding movement of the composite strand. In this embodiment of the invention the shaft 30a of the worm gear 29a is mounted in a carriage or support 'Ill which is adjustably mounted on the bed Ta so that it can be moved toward and from the stand- 21a in which are mounted feed rolls corresponding with the feed rolls 24, 25 and 2B of Fig. 3.

In this embodiment of the invention the gear tia which meshes with the gear 32a is a change gear and can be removed from the shaft a and replaced by another gear of a different size. The

adjustability of the stand or carrier 'I0 provides for maintaining the proper meshing relation between the gears 3ia and 32a regardless of the size of the gear Bia.

If a larger gear Bla is used than that shown in Fig. 2, thespeed of the feed rolls 24. 25. 2i will be increased and as a result the turns of the plural ply strand about the core strand will be separated somewhat, the amount of such separation depending upon the size of the gear Bia.

If the plural ply strand 2 is so wound about the core strand that the turns of the plural ply strand are spaced from each other, the result will be that when the composite strand has been treated to set the curl and the plural ply strand has been reduced to its individual curled yarn ends, said yarn ends will have a wavy instead of a tightly curled condition. For some purposes, it may be desirable to produce a curled yarn having a wavy effect rather than a tightly curled effect and the provision of the change gear 9Ia makes is possible to produce a curled yarn with a more or less tightly curled effect.

The composite strand 35 may be wound on a suitable beam 39 by any suitable winding mech anism, and as herein shown, said beam is carried by a shaft 40 and it is driven through a friction drive llfrom a worm gear 4I that is loosely mounted on said shaft 40 and meshes with and in turn is driven by a worm 42 carried by the drive shaft 2i. Associated with the beam -39 is a traverse mechanism 43 by which the composite strand 35 is properly laid on the beam 39. Said traverse mechanism may be of any usual type and that herein shown comprises a guide eye 44 through which the composite strand 35.passes and which is carried by a block 45 that is equipped with a shoe adapted to travel in the reversing cam groove 46 formed in a vertical shaft 41- so that the rotation of the shaft 41 will move the block Cil v 6 45 up and down or back and forth parallel to the axis of the beam 39.

The shaft 411s driven from the shaft 40 carrying the beam 39, and for this purpose said shaft has associated therewith a sprocket wheel 48 connected by a sprocket chain 49 to a sprocket wheel 5I) fast on the shaft 41.

The core strand Awhich I prefer to use is a plural ply twisted strand, that is, a strand made by twisting together two or more individual threads 5I and seen in Fig. 6. The direction of rotation of the bobbin carrier 4 `is such as to take out the twist from the core strand with the result that when said strand is delivered from the nose portion II at the point where the plural ply strand 2 is wound thereabout, said core strand is in the form of a plurality of parallel ends 5I and has very little, if any, twist therein. The pulling strain which the feed rolls 24, 25, 28 impart to the composite strand in feeding said strand forward is taken by the core strand, and

' the advantage of a core strand which is without any appreciable twist and in which the plies lle practically straight and parallel is that a core strand of this type will have much less tendency to stretch than a core strand made up of a plurality lof plies tightly twisted together.

The use of a substantially non-stretchable core strand between the points where the plural ply strand 2 is wound thereabout and the feed rolls avoids the possibility that the spacing of the turns of the plural ply strand 2 about the core strand will be changed by a stretching 'of the core strand during the forward feeding operation. After said composite strand has been steamed or otherwise treated to set the curl in the individual plies of the plural ply strand 2, then the core strand I is removed thereby leaving the coiled plural ply strand in which the individual yarn ends have a parallel non-twisted relation, said coiled plural ply strand having such characteristics that the application of a pulling force to said plural ply strand in the direction of its length will convert the same from a coiled condition into one in which the individual curled yarn ends 52 have a substantially parallel nontwisted relation as shown in Fig. 6. While'the application of the pulling force will tend v to straighten the plural ply strand 2, yet when the pulling strain is released, the individual yarn ends will automatically assume their curled condition as shown at the extreme right in Fig. 6. The core strand I may be removed from the composite strand in various ways without departing from the invention. One method of securing this result would be'to cut the core strand into relatively short lengths on the order of two or three inches. This could bel done by separating two adjacent turns of the plural ply strand sufficiently to insert the point of a pair of scissors or some other cutting tool into a position to cut the strand I. If the strand I is cut into separate short lengths, then when the plural ply strand is pulled out from itscoiled condition shown in Fig. 6, the short lengths of the core strand will simply fall away.

Another way of disposing ofthe core strand would be to make it of some synthetic material which could be dissolved by immersing the composite strand in a suitable solvent for the material of the core strand that would not have any chemical effect on the plies of the plural ply strand 2.

Y Still another way of removing the core strand would be to unwind it from the composite stiand in a weaving operat thereby to wrap the aseaese 7 as shown in lllg. 8. This could be done by a suitable mechanism which would take the core strand and carry it around the composite strand as shown diagrammatically in Fig. 8, such operation withdrawing the core strand from between the successive turns of the coiled plural ply strand.

When the core strand has been thus removed. then the individual curled yarn ends 52 can be withdrawn directly from the' curled plural ply strand by applying a pulling force to the.` yarn ends in the direction oi' the length of such coiled plural ply strand as shown in Fig. d.

The plural ply strand is so formed that the individual yarn ends l2 composing the strand lie substantially parallel and in a non-twisted relation, both while the strand is in its coiled condition, and when the coiled strand has been straightened more or less by the application of a pulling force thereto. The individual curled yarn ends 52 can thus be taken directly from the coiled plural ply strand and wound on individual yarn carriers or bobbins'ready for use ion.

The arrangement herein shown by which the are taken from oi supply, and the manner in which said plural ply strand is wound about the core strand has this important advantage; that the length ofthe yarn ends Il to be wrapped about the core strand in any one operation can be greatly increased over what is possible with methods now in use, such length being limited only by the capacity of the bobbin s carrying the core strand. The core strand may be relatively small so that a bobbin such as shown in the drawings will readily accommodate a core strand of several thousand yards in length.

The beam 39 on which the composite strand is wound may be oi' any desired size and may readily be of a size to receive a composite strand as long as the length of the core strand which is carried by the bobbin 3. This is an important feature from cause it provides for making long lengths of curled yarn at a single operation and avoids the necessity of making the curled yarn in relatively short lengths as has heretofore been done.

I claim:

1. A` device of the class described comprising a rotary carrier, a bobbin carrying a core strand mounted on said carrier and arranged co-axially therewith, means to rotate the carrier and the bobbin carried thereby about the axis thereof, means to withdraw the core strand from the bobbin as the carrier rotates and feed it forward in the axial line of both the bobbin and the cara commercial standpoint, be-` axial passage through 25 f yarn ends comprising the pluralply strand 2 a creel or other stationary source 2.\A device oi' the class described comprising a rotary bobbin carrier, a bobbin carrying a core strand mounted thereo said carrier having an which the core strand is delivered, means to withdraw the core strand from the bobbin through said axial passage, means independent and spaced from the bobbin carrier for supplying a plural ply strand ot the yarn to be curled to the carrier, the latter having a guide opening spaced radially from said passage near the delivery end thereof, said plural ply strand extending around the bobbin and through said guide opening to the end of said axial passage. and means to rotate the bobbin carrier thereby to carry the plural ply strand around the bobbin and to wrap said plural ply strand about the core strand as it is delivered from said passage.

8. A device oi the class described comprising a rotary bobbin carrier, a bobbin carrying a core strand mounted thereon, said carrier having a nose portion and an axial passage which extends through and terminates at said nose portion, and also having a guide opening spaced radially from said the core strand from the bobbin and through said axial passage. a stationary source of supply for the yarn to be curled from which a plural ply strand of such yarn is delivered. said plural ply strand extending around the bobbin and through said guide opening to the end oi. the nose, and means to rotate the carrier thereby to carry-the plural ply strand around the bobbin and to wrap `thereby separating the rier. a stationary source of supply for the yarnf to be curled situatedin the rear of the carrier and from which is delivered va plural ply strand? of such yarn made up of separate yarn ends having a parallel and non-twisted relation, means acting on a portion of such pluralply strand remote from its source of supply both to carry such portion repeatedly completely around both said bobbin and the core strand delivered therefrom plural ply strand around the apply periodically to such portion of the plural ply strand an appreciable tension sui'ilcient to feed it forward from` its supply source and then to relieve such tension. whereby the individual yarn ends ot the plural ply strand are in a non-twisted relation when s0 wrapped about the core strand.

core strand and to been withdrawn from its ling the portion of the plural ply strand between it tightly about the core strand as the latter emerges from the axial passage.

4. The method oi.' making curled yarn which comprises withdrawing a core strand from a source of supply, withdrawing from a stationary source oi' supply a plural ply strand of the yarn to be curled in which the individual yarn ends lie straight and parallel and in a non-twisted relation. and delivering said plural ply strand while in such non-twisted relation to the core strand after the latter has been withdrawn from its source of supply, carrying the portion of the plural ply strand between its stationary source of supply and the point where it is delivered to the core strand repeatedly completely around the entire supply source for the core strand and said core strand as it is delivered therefrom thereby to wrap said plural ply'strand around the core strand and produce a composite strand. treating the composite strand to set the curl in the plies of the plural ply strand, and then applying a pulling force to the plural ply strand in the direction of the length of the composite strand plural Ply strand into individual curled yarn ends which lie substantially parallel and in a non-twisted relation to the plural ply strand in the direction of the length of the composite strand.

5. The method of making curled yarn which comprises withdrawing a core strand from a source oi'supply, withdrawing from a stationary source of supply a pluraly ply strand of the yarn to be curled in which the individual yarn ends are straight and paralleland in a non-twisted relation, and delivering said plural ply strand with its individual yarn ends in such non-twisted relation to the core strand after the latter has source oi supply, carryits stationaryl source of supply and the point where it is delivered to the core strand repeatedly around the supply source ior the' core strand axial passage, feeding means to withdraw assenso thereby to wrap said plural ply strand around the core strand and produce a composite strand, treating the composite strand to set the curl in the plies of the plural ply strand, eliminating the core strand, and then applying a pulling force to the plural ply strand in the direction of the length of the composite strand thereby separating the plural ply strand into individual curled yarn ends which lie substantially parallel and in non-twisted relation.

6. A device of the class described comprising a rotary carrier, a bobbin carrying a core strand mounted on said carrier, means to rotate the carrler. means to withdraw the core strand from the bobbin as the carrier rotates and feed it forward in the axial line of the carrier, a stationary source of supply for the yarn to be curled from which is delivered a. plural ply strand of such yarn made up of separate yarn ends having a parallel and non-twisted relation, said plural ply strand ex tending from its source of supply around the bobbin to the core strand, the point where said plural ply strand is delivered from its source being onset from the axial line of the bobbin, and means acting on the portion of the plural ply strand between its offset point of delivery and the point where it is delivered to the core strand to carry "such portion repeatedly completely around the rotating bobbin thereby to wrap the plural ply strand about the core strand, the offset relation of said point o! delivery of the plural ply strand causing said portion of the plural ply strand to be subjected to an increased pulling strain during a portion of each rotation of the carrier and to be substantially relieved from pulling strain during another portion of each rotation of the carrier.

.non-twisted relation, said carrier having a guide opening also offset from said axial line through which said plural ply strand extends to the core yarn asthe latter is delivered from the carrier,

whereby rotation of the carrierI carries the por-` tion oi said plural ply strand between its source of supply and the point where it is delivered to the core strand repeatedly and completely about the bobbin, said plural ply strand because of the offset relation of its point ,of supply being subjected during a portion of each rotation of the carrier to an increased pulling strain by which it is fed forward and being relieved from pulling strain during another portion oi' each rotation of. the carrier.

8. The method of making curled yarn which comprises withdrawing a core strand from a source of supply, withdrawing from a stationary source of supply a plural ply strand of the yarn to be curled in which the individual yarn ends are straight and parallel and in a non-twisted relation.. delivering said plural ply strand with its individual yarn ends in such non-twisted relation to the core strand after the latter has been withdrawn from its source of supply, carrying the portion of the plural ply strand between its stationary source of supply and the point where it ing force to the plural ply strand in the direction o f the length of the composite strand thereby separating the plural ply strand into individual curled yarn ends which lie substantially parallel and in a non-twisted relation.

9. A device of the class described comprising a rotary carrier. a bobbin carrying a core strand mounted on said carrier, means to rotate the carrier', means to withdraw the core strand from the bobbin as the carrier rotates and feed it forward in the axial line ofthe carrier, a stationary source of supply for the yarn to be curled from which is delivered a plural ply strand of such yarn made up of separate yarn ends having a parallel and non-twisted relation. said plural ply strand extending from its source of supply around the bobbin to the core strand, the point Where y said plural ply strand is delivered from its source being offset from the axial line of the bobbin, and means acting on the portion of the plural ply strand between its oiset point oi delivery and the point where it is delivered to the core strand to carry such portion repeatedly and completely around the rotating bobbin thereby to wrap the plural ply strand about the core strand and to apply to such portion of the plural ply strand both an increased pulling force and a reduced pulling force during each -rotation oi such portion about the bobbin.

l0. The steps in the method oi making curled yarn which comprise withdrawing a twisted core strand from a bobbin constituting a source of supply for said strand, rotating said bobbin about an axis which coincides with the line in which the core strand is delivered from the bobbin and in a direction to remove the twist from the core strand, withdrawing from a source of supply a plural ply strand of yarn to be curled `in which the individual yarn ends are parallel and in a non-twisted relation. delivering said plural ply strand to the core strand after the latter has been delivered from its source of supply and the twist has been removed therefrom, carrying the portion of the plural ply strand between its'source of supply and the point where it is delivered to the core strand repeatedly completely around the supply bobbin for the core strand while still maintaining the individual yarn ends of the plural ply strand in their parallel non-twisted relation, thereby` to' wrap said plural ply strand around the core strand and produce a composite strand in which the core strand is in a nontwisted condition.

11. A device of the class described comprising a source of core strand supply, means to feed said core strand forward from said supply source,

a stationary source of supply for the yarn toV is delivered to the core strand repeatedly and is' delivered therefrom and alternately to apply vidual yarn ends of said plural ply strand still in their parallel non-twisted relation.

12. A device of the class described .comprising a rotary carrier, a bobbin carrying a core strand 10 mounted on said carrier, means to rotate the carrier and the bobbin mounted thereon,means to withdraw the core strand from the bobbin as the carrier rotates and feed it forward in the axial line of the carrier, a stationary source oi supply for the yarn to be curled from which is delivered a plural ply strand of such yarn made up of separate yarn ends having a parallel and nontwisted relation, said plural ply strand extending from its source of supply to the core strand outside of the bobbin, and means acting on the portion of th-plural ply strand between its source l2 of supply and the core strand to carry such por tion repeatedly and completely around the bobbin and to alternately apply an appreciable tension thereto during a part of each movement around the bobbin and to relieve said tension during another part of such movement, whereby the plural Iply strand is wrapped about the core strand with the individual .yarn ends in a-nontwisted relation.

' EDGAR GREENWOOD.

REFERENCES CITED The following references are of record in the i'lle of this patent:

UNITED STATES PATENTS Johnston, Jr. Oct. 7, 1941 

